best uncommon mtg cards Uncommonly Valuable Best Uncommons of all time?

This is the kind of thing where I was in the room as the teams were coming up with these solutions

Back Sephiroth, One-Winged Angel Legendary Creature - Angel Nightmare Avatar Flying Super Nova - As this creature transforms into Sephiroth, One-Winged Angel, you get an emblem with "Whenever a creature dies, target opponent loses 1 life and you gain 1 life." Whenever Sephiroth attacks, you may sacrifice any number of other creatures

Emrakul, the Promised End In its first reprint, this $50+ Eldrazi card packs a punch, and its one of the best expensive cards to actually see play, not only in EDH but in 60-card Constructed decks

You may play a land this way only during your own turn and only if you have not yet played a land this turn

Lets check out the most exciting cards

Will it Work